IS 9397: Dimensions for Binding Mounting Area for Alpine Skis

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IS 9397 : 2001
ISO 8364: 1991

Indian Standard

ALPINE SKIS AND BINDINGS — BINDING
MOUNTING AREA — REQUIREMENTS AND

TEST METHODS

( First Revision )

ICS 97.220.20

© BIS 2001^

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

June 2001 Price Group 4

Mountaineering Equipment Sectional Committee, BP 27

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical with ISO 8364 : 1991 'Alpine skis and bindings
— Binding mounting area — Requirements and test methods' issued by the International Organization
for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of
Mountaineering Equipment Sectional Committee and approval of the Basic and Production
Engineering Division Council.

This standard was originally published in 1980 and was in conformity with ISO 5144 : 1977 'Alpine
skis — Binding mounting area' which has now been replaced by ISO 8364 : 1991 which constitutes a
technical revision. The revision has been taken up to harmonize with the latest version of International
Standard ISO 8364 : 1 991 . The following major changes have been included while revising the
specification:

a) Alpine skis have been grouped into 4 groups according to the nominal length.

b) Strength requirement of binding mounting area and its test methods have been included.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard
without deviations. In this adopted standard, certain terminology and conventions are not identical to
those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be
read as 'Indian Standard'.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice
is to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which Indian
Standards also exist. The corresponding Indian Standards which are to be substituted in their place
are listed below along with their degree of equivalence for the editions indicated:

International Corresponding Degree of

Standard Indian Standard Equivalence

ISO 2632-1 : 1985 IS 4290 (Part 1) : 1992 Roughness comparison Identical

specimens: Part 1 Turned, ground, bored,
milled, shaped and planed {first revision)

ISO 6004: 1991 IS 11042 (Part 1) : 1984 Binding screws for Modified

alpine skis: Part 1 General requirements

ISO 6289: 1985 IS 9317:2001 Glossary of terms, definitions do

and measuring conditions for skis (first revision)

ISO 6506 : 1981 IS 1500:1983 Method for Brinell hardness test do

for metallic materials

The concerned Sectional Committee reviewed the provision of ISO 10045:1991 referred in this
adopted standard and has decided that it is acceptable for use in conjunction with this standard.

In reporting the result of a test or analysis made in accordance with this standard, if the final value,
observed or calculated, is to be rounded off, it shall be done in accordance with IS 2 : 1960 'Rules for
rounding off numerical values (revised)'.

IS 9397:2001
ISO 6364 : 1991

Indian Standard

ALPINE SKIS AND BINDINGS — BINDING

MOUNTING AREA — REQUIREMENTS AND

TEST METHODS

( First Revision )

1 Scope

This International Standard specifies requirements
and test methods for binding mounting areas, ski
bindings and retention devices of alpine skis in or-
der to optimize the compatibility of the functional
unit "ski-binding — retention device — boot".

It contains data for the manufacturer of alpine skis,
bindings and retention devices concerning dimen-
sions, tests and other specifications for the binding
mounting area.

This International Standard is applicable to alpine
skis of the following nominal lengths:

— group 1: / N > 1 700 mm"

— group 2: 1 400 mm < / N < 1 700 mm

— group 3: 1 000 mm < l N < 1 400 mm

— group 4: 750 mm < 4i < 1 000 mm

The requirements for group 1 are also applicable to
adult skis shorter than 1 700 mm.

For dimensions with no tolerance indicated, a toler-
ance of ± 1 mm is valid.

2 Normative references

The following standards contain provisions which,
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
cation, the editions indicated were valid. All stan-
dards are subject to revision, and parties to
agreements based on this International Standard
are encouraged to investigate the possibility of ap-
plying the most recent editions of the standards in-

dicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.

ISO 2632-1:1985, Roughness comparison specimens

— Part 1: Turned, ground, bored, milted, shaped and
planed.

ISO 6004:1991, Alpine skis — Ski binding screws —
Requirements.

ISO 6289:1985, Skis — Terms and definitions.

ISO 6506:1981, Metallic materials — Hardness test —
Brinell test.

ISO 10045:1991, Alpine skis — Binding mounting area

— Requirements for test screws.

3 Definitions

For the purposes of this International Standard, the
definitions of ISO 6289, and the following, apply.

3.1 binding mounting: All the connections between
the parts of the binding and the ski, especially de-
signed to transmit the forces between binding and
ski and which shall fulfil the minimum strength re-
quirements determined for the function of the bind-
ing.

4 Specifications of binding mounting area

4.1 Indication of mounting point

The mounting point shall be located by the ski
manufacturer with a clearly visible mark at least on
the left side and/or the top surface of the ski, up to
the left outer edge.

1) To be foreseen in the functional unit, where ski boots of size > 22 (Mondopoint system) are used.

IS 9397:2001
ISO 8364 : 1991

4.2 Length of binding mounting area

The length of the binding mounting area forwards
and backwards from the mounting point shall be

— group 1: 275 mm

— group 2: 240 mm

— group 3: 210 mm

— group 4: 190 mm

4.3 Width of binding mounting area

The. minimum width of the binding mounting area
shall be

— groups 1 and 2: 48 mm

— groups 3 and 4: 46 mm

symmetrical about the longitudinal axis of the ski.

4.4 Centre-to-centre distances for binding
mounting screws

4.4.1 Maximum centre-to-centre distance

The maximum centre-to-centre distance perpen-
dicular to the centre line of the ski shall be such that
the screws are located entirely within the binding
mounting area.

If standard ski binding screws of nominal diameter
ST 5,5 are used, the maximum centre-to-centre dis-
tance of the binding mounting screws shall be

— groups 1 and 2: 42,5 mm

— groups 3 and 4: 40,5 mm

4.4.2 Minimum centre-to-centre distance

For screws which are used for mounting of parts of
the binding and retention devices, the centre-to-
centre distance shall not be less than

— groups 1 and 2: 25 mm in the longitudinal direc-
tion and 20 mm in all other directions

— groups 3 and 4: 20 mm in the longitudinal direc-
tion and 15 mm in all other directions

4.5 Conditions relating to the surface of the
binding mounting area

4.5.1 Transverse profile (convexity) of the surface

Deviations of straightness of the transverse profile
from a flat profile are only permissible in the form
of a constant curve across the width of the mounting
area; the tolerance on straightness within this area
is given in figure 1.

Tolerance In millimetres
Width of binding mounting area

Figure 1 — Transverse profile of the surface

There shall be no step in the profile within a width
of

— 55 mm for groups 1 and 2

— 50 mm for groups 3 and 4

symmetrical to the longitudinal axis; outside this
area steps are allowed only into the body of the ski.

4.5.2 Longitudinal profile of the surface

Deviations from straightness of the longitudinal pro-
Tile from a flat profile are only permissible in the
form of a constant curve in the length of the mount-
ing area; the tolerance on straightness in this area,
the ski base being pressed against a flat surface, is
given for

— groups 1 and 2: 5 mm

— groups 3 and 4: 4 mm
in figure 2.

IS 9397:2001
ISO 8364:1991

Tolerance In millimetres

Groups
1and2

Groups
3 and 4

Lflngm or DncRnQ
mounflnQ mm

ELH

-ET3

^

Figure 2 — Longitudinal profile of the surface

4.5.3 SMe walls

Side walls shall be designed so that binding mount-
ing with commonly used mounting devices is en-
sured. The basic requirement is that the clamping
elements of the mounting device reach at least to
the running surface of the ski.

4.6 Minimum thickness of binding mounting
area of ski

Within the total binding mounting area, a drill hole
depth, <f, shall be available (see figured) as follows:

— groups 1 and 2: 9,5 mm

— groups 3 and 4: 7,5 mm

Figure 3 — Penetration depth, d, of mounting
screws

5 Strength requirements of binding
mounting area

5.1 Screw retention strength

Within the defined binding mounting area, the mini-
mum value of the screw retention strength for two
screws, if the load is applied quasi-statically, shall
be as follows:

— group 1: 2200 N min.

— group 2: 1 800 N min.

— group 3: 1 300 N min.

— group 4: 1 300 N min.

5.2 Stripping resistance of the binding
mounting area of the ski

The minimum value of the stripping resistance of the
ski shall be 5 N-m for groups 1 and 2.

NOTE 1 The present state of the art does not allow a
stripping resistance of 5 Nm for skis of groups 3 and 4. It
is the responsibility of the ski manufacturer to indicate ski
models demanding caution (stripping resistance lower
than 5 N-m) when mounting bindings and to give mounting
instructions such as smaller diameter drilling and manual
screwdriving.

6 Specifications of the binding

The hole-pattern shall be in accordance with the
geometrical requirements of 4.2, 4.3 and 4.4.

In order to ensure the required penetration depth,
the manufacturer of the binding shall select a suit-
able length of binding screw, so that after binding
mounting the shaft of the screw penetrates the ski.
For

— groups 1 and 2: d = 8 mm + 0,5 mm

— groups 3 and 4: d = 6 mm ± 0,5 mm

To avoid damaging the top layers (damage to the
adhesive bond) the diameter of mounting plate holes

IS 9397:2001
ISO 8364 : 1991

or countersink facing the ski shall not exceed 7 mm
and drill countersink shall be designed in such a
way that its penetration into the top surface of the
ski does not exceed 0,6 mm.

As mounting elements, ski binding screws in ac-
cordance with ISO 6004 shall be used.

7 Apparatus

7.1 Retention strength

7.1.1 Tensile testing machine (with a pull-out de-
vice according to figure 4), having a minimum load
range of 10000 N.

The pull-out device (see figure 4) shall consist of:

a) a steel attachment plate (A) with two holes of di-
ameter 6 mm — steel hardness shall be
135 HB30 according to ISO 6506;

b) a universal joint (B) which is connected to the
attachment plate and to the clamping device of
the test machine;

c) a ski support (C) with two support rollers.

When using standard test screws according to
clause 8, the following penetration depths, d, shall
be reached:

— groups 1 and 2: d = 8 mm ± 0,5 mm

— groups 3 and 4: d = 6 mm + 0,5 mm
7.2 Stripping resistance

7.2.1 Jig, for drilling holes, mounting test screws
and determination of stripping torque (see figure 5).

The jig, used with a drill bushing, guarantees exact
drill holes and screw mounting perpendicular to the
top surface of the ski.

The jig is equipped with a friction plate made of steel
with hardness of approximately 135 HB30 according
to ISO 6506, and surface roughness R a of 0,8 urn
according to ISO 2632-1.

When using standard test screws according to
clause 8, the following penetration depths shalt be
reached:

— groups 1 and 2: d = 8 mm ± 0,5 mm

— groups 3 and 4: d = 6 mm + 0,5 mm

Dimensions in millimetres

ZOO

,30„

\

[

m

/

Ttifcknn* according to thq
psnstratlofi dflpth noodod

B

H-

Groups 1 and 2: a - 25
Groups 3 end 4: a = 20

Figure 4 — Tensile testing machine with pull-out device

IS 9397:2001
ISO 8364 : 1991

Dimensions In millimetres

*11eB
011 H7 •«H7

A = DriM jig bushing
B - Drill fa
C = Friction plate
D " Centering pin

Figure 5 — Drill and test jig

IS 9397:2001
ISO 8364 : 1991

8 Test screws

The screws used for the retention and stripping tests
shall be in accordance with ISO 10045.

9 Procedure

9.1 Sampling and conditioning

Carry out the test on three pairs of skis at a room
temperature of 23 °C ± 5 °C, without specific pre-
conditioning of the ski to be tested.

9.2. General requirements

Test the requirements of 4.1 to 4.6 by measurement
and/or sight check.

9.3 Retention strength test

9.3.1 Mounting of the attachment plate

It is recommended that a drill jig be used to ensure
exact drill holes, perpendicular to the top surface of
the ski, and at the exact distance apart.

Ensure that the dimensions of the drill holes are as
follows:

— drill hole diameter: 4,1 mm H12

— drill hole depth:

groups 1 and 2: 9 + J 5 mm
groups 3 and 4: 7 + J 5 mm

Ensure that the drill countersink is in accordance
with clause 6.

Ensure that the screws are mounted perpendicular
to the top surface of the ski, without pretapping and
without lubrication.

Tightening torque:

— groups 1 and 2: 4 ± 0,5 N.m

— groups 3 and 4: 3 ± 0,5 N.m

9.3.2 Positioning of the pull-out tests within the
binding mounting area

The location of the pull-out tests within the binding
mounting area is shown in figure 6. Locations 1 and
2 are those which are specified by this International
Standard. Choose locations 3 and 4 at random, but
ensure that the distance with respect to the side of
the mounting area is as specified in figure 6. The
minimum spacing in the longitudinal direction, a, is

— groups 1 and 2: 25 mm

— groups 3 and 4: 20 mm

Ensure that the tests are not influenced by the pre-
ceding tests. If the top skin is delaminated during a
retention test, continue the test on another ski.

1

ajo.

(S*4.2)

*

!3

*

±

#

Dimensions in millimetres

i+

Figure 6 — Positioning of the pull-out tests within the binding mounting area

IS 9397:2001
ISO 8364:1991

9.3.3 Load application

Ensure that the loading rate is quasi-static, not more
than 20 mm/min.

Measure the maximum load which is applied during
the load application.

Measuring accuracy: ± 50 N.
9.4 Stripping resistance test

9.4.1 Use the test jig with a drill bushing to drill a
hole with 4,1 mm H12 ( + J 12 mm) and a depth
of 8,5 mm for groups 1 and 2, and 6,5 mm for groups
3 and 4.

Where a smaller drill diameter is recommended by
the ski manufacturer, complementary tests accord-
ing to the ski manufacturer's recommendation will
be for information only.

9.4.2 Mount and tighten the test screw, always with
the test jig as a guide, without the drill bushing. Ap-
ply an increasing torque with a torque wrench
screwdriver until a drop of the torque resistance in-
dicates failure of the thread or until the load equals
the tightening moment specified in 5.2.

Ensure that the vertical force applied to the screw-
driver is less than 500 N.

Carry out the test with a minimum of 10 different
screws of the same type.

Use a new hole in the friction plate for each test.

10 Test report

The test report shall include the following infor-
mation.

a) reference to this international Standard;

b) ski brand, model designation, nominal length,
year of manufacture and serial number;

c) testing machine: type, load range and loading
rate;

d) sketch showing locations 1, 2, 3 and 4;

e) test results on three pairs of skis and type of
failure for groups 1, 2, 3 and 4, respectively;

f) test results of stripping resistance on three pairs
of skis;

g) any deviation from this International Standard
and reasons for this deviation.

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harmonious development of the activities of standardization, marking and quality certification of
goods and attending to connected matters in the country.

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Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are
also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates
that no changes are needed; if the review indicates that changes are needed, it is taken up for revision.
Users of Indian Standards should ascertain that they are in possession of the latest amendments or
edition by referring to the latest issue of 'BIS Catalogue' and 'Standards: Monthly Additions'.

This Indian Standard has been developed from Doc : No. BP 27 (0074).

Amendments Issued Since Publication

Amend No.

Date of Issue

Text Affected

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